Move to epel 7-1 release

EPEL7 has updated.  AFAIK there is no better way to determine this; we
could possibly scrape [1] but this just seems to replace one problem
with another (maintaining the scraping)

[1] http://download.fedoraproject.org/pub/epel/7/x86_64/repoview/epel-release.html

Change-Id: Iadf66c92fcf31edeb0f364a5b1de5d87630e9a42
diff --git a/stack.sh b/stack.sh
index 1661b36..184c91a 100755
--- a/stack.sh
+++ b/stack.sh
@@ -236,7 +236,7 @@
 if [[ is_fedora && ( $DISTRO == "rhel6" || $DISTRO == "rhel7" ) ]]; then
     # RHEL requires EPEL for many Open Stack dependencies
     if [[ $DISTRO == "rhel7" ]]; then
-        EPEL_RPM=${RHEL7_EPEL_RPM:-"http://dl.fedoraproject.org/pub/epel/beta/7/x86_64/epel-release-7-0.2.noarch.rpm"}
+        EPEL_RPM=${RHEL7_EPEL_RPM:-"http://dl.fedoraproject.org/pub/epel/beta/7/x86_64/epel-release-7-1.noarch.rpm"}
     elif [[ $DISTRO == "rhel6" ]]; then
         EPEL_RPM=${RHEL6_EPEL_RPM:-"http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm"}
     fi